Nordson kinetix, Руководство пользователя

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Installation
3-3
Part 334598G03
E
2008 Nordson Corporation
Air and Fluid Hose Connections
Spray gun fittings accept standard Nordson hoses.
Air Hose
The air hoses supplying air to the spray gun should be no longer than
7.62 m (25 ft).
Limit the number of restrictions in the air supply lines and hose to provide
maximum air flow.
1. Clean the air hose fittings with a clean, dry cloth.
2. Connect the trigger air hose between the
1
/
4
-in. tube fitting in the spray
gun handle and the air supply outlet.
Fluid Hose
WARNING: The fluid hose must be a grounding-type hose with continuity
between fittings. Without a ground, a static charge could build up in the
spray gun, resulting in shocks to the operator or sparking that could cause a
fire. Resistance checks, from hose fitting to hose fitting, should be a part of
your regular maintenance procedures.
As coating materials become more conductive (lower resistivity) more
current will bleed back through the fluid column in the fluid hose to the
grounded fitting. With a very conductive material like water, all of the
current will bleed to the ground and the spray gun would essentially be
shorted.
A certain level of conductivity is required for electrostatics to be practical.
Coating materials with resistivities of 0.75 − 2.0 M

usually work well. The
transfer efficiency and wrap could be reduced as coating resistivities fall
below 0.10 M

Figure 3-2 identifies the optimum coating resistivities for electrostatics of
0.75 − 2.0 M

Figure 3-3 charts the rapid increase of current bleeding through the fluid
column to ground as coating resistivity decreases.